If you accelerated the H to 130,000rpm you would be cheating!gruntguru wrote: ↑04 Apr 2018, 06:13Some great info in that post Tommy.Tommy Cookers wrote: ↑03 Apr 2018, 14:34fwiw my guess (from a bit of experience)
the electromagnetic time constant of the H is regardable as 20 msec bare and 40 msec incl inertias eg turbine and compressor ie it can accelerate (in vacuum) in 40 mSec to 63% of any step change in demanded rpm so 8% change in rpm in 20 mSec seems not implausible even with the high and strongly rpm-related compressor loads
it now seems to me that with DI the ICE torque turndown and turnup can be a few msec ('1 rev')
iirc the time window when 2 gears load path components are in position simultaneously is 4 msec ('1 rev')
the time constant of ICE/K rpm is maybe 30 msec ie16% rpm turndown in 10 msec seems possible
What is the power required to accelerate the H from say 120k rpm to 130k (120k + 8%) in 20 mSec?
Definitely plausible - if needed they could change the setpoint for the H before the gearshift even started.
The H has a maximum speed of 125,000rpm.